ijͬѧÔÚÑо¿¡°¶Ô²»Í¬ÎïÌå×öÏàͬ¹¦Çé¿öÏ£¬ÎïÌåÖÊÁ¿ÓëËٶȵĹØϵ¡±Ê±£¬Ìá³öÁËÒÔÏÂËÄÖÖ²ÂÏ룺
A£®     B£®    C£®    D.
ΪÑéÖ¤²ÂÏëµÄÕýÈ·ÐÔ£¬¸ÃͬѧÓÃÈçͼËùʾµÄ×°ÖýøÐÐʵÑ飺½«³¤Ä¾°åƽ·ÅÔÚˮƽ×ÀÃæÉÏ£¬Ä¾¿é¹Ì¶¨ÔÚ³¤Ä¾°åÒ»¶Ë£¬´òµã¼ÆʱÆ÷¹Ì¶¨ÔÚľ¿éÉÏ£¬Ä¾¿éÓÒ²à¹Ì¶¨Ò»Çᵯ»É£¬ÓÃÁ¬½ÓÖ½´øµÄС³µÑ¹Ëõµ¯»ÉÖÁ³¤Ä¾°åµÄÐéÏß´¦Óɾ²Ö¹ÊÍ·Å£¬´òµã¼ÆʱÆ÷ÔÚÖ½´øÉÏ´òÏÂһϵÁе㣬ѡȡµã¼£¾ùÔȵÄÒ»²¿·ÖÖ½´ø£¬¼ÆËã³öС³µÔÈËÙÔ˶¯µÄËٶȣ¬²â³öС³µµÄÖÊÁ¿£»È»ºóÔÚС³µÉϼÓíÀÂ룬ÔÙ´ÎѹËõµ¯»ÉÖÁľ°åÐéÏß´¦Óɾ²Ö¹ÊÍ·ÅС³µ£¬¼ÆËã³öС³µºÍíÀÂëÔÈËÙÔ˶¯µÄËٶȣ¬²â³öС³µºÍíÀÂëµÄ×ÜÖÊÁ¿£ºÔÙÔÚС³µÉϼÓíÀÂ룬Öظ´ÒÔÉϲÙ×÷£¬·Ö±ð²â³ö¡¢ ¡£

£¨1£©Ã¿´ÎʵÑéÖУ¬¶¼½«Ð¡³µÑ¹Ëõµ¯»ÉÖÁ³¤Ä¾°åµÄÐéÏß´¦Óɾ²Ö¹ÊÍ·Å£¬Ä¿µÄÊÇ_________________________£»
ÈôÒªÏû³ýÿ´ÎʵÑéÖÐС³µºÍÖ½´øÊܵ½µÄ×èÁ¦¶ÔС³µÔ˶¯µÄÓ°Ï죬Ӧ½øÐеÄʵÑé²Ù×÷ÊÇ______________________________________________¡£
£¨2£©Ä³´ÎʵÑé²É¼¯µÄÎå×éÊý¾ÝÈçÏÂ±í£º


Óɱí¸ñÊý¾ÝÖ±¹ÛÅжϣ¬Ã÷ÏÔ²»ÕýÈ·µÄÁ½¸ö²ÂÏëÊÇA¡¢B¡¢C¡¢DÖеÄ__________£»Èô¶Ôij¸ö²ÂÏë½øÐÐÊý¾Ý´¦Àí²¢×÷ͼ£¬»­³öÁËÈçͼËùʾµÄͼÏó£¬ÔòͼÖеĺá×ø±êÓ¦ÊÇ_____________¡£
£¨1£©Ð¡³µ»ñµÃÏàͬµÄ¶¯ÄÜ£¨µ¯»É¶ÔС³µ×ö¹¦Ïàͬ£©£»µæ¸ßľ°å¹Ì¶¨´òµã¼ÆʱÆ÷µÄÒ»¶Ë£¬Ê¹Ð¡³µÁ¬Í¬Ö½´øÒ»ÆðÔÚľ°åÉÏÔÈËÙÔ˶¯£¨Æ½ºâĦ²ÁÁ¦£©£¨2£©AC£»

ÊÔÌâ·ÖÎö£º£¨1£©Èõ¯»Éÿ´Î´ÓͬһλÖÃÊÍ·Å£¬ÒÔ±£Ö¤µ¯»É¶ÔС³µ×ö¹¦Ïàͬ£¬¼´ÈÃС³µ»ñµÃÏàͬµÄ¶¯ÄÜ£®ÎªÏû³ý×èÁ¦µÄÓ°Ï죬±£Ö¤Ã¿´Î¶¯Äܶ¼ÊÇÓɵ¯»É×ö¹¦»ñµÃµÄ£¬¿ÉÒÔ½«Ä¾°å´øÓмÆʱÆ÷µÄÒ»¶Ëµæ¸ß£¬ÈÃС³µÃ»Óе¯»ÉµÄ×÷ÓÃʱ×öÔÈËÙÔ˶¯¼´¿É£®
£¨2£©¸ù¾ÝͼÖеÄÊý¾Ý¿ÉÖª£¬ÖÊÁ¿Ô½´ó£¬ËÙ¶ÈԽС£¬ËùÒÔ²ÂÏëÖÐACÑ¡ÏîÃ÷ÏÔ²»ÕýÈ·£»¸ù¾ÝÊý¾Ý×÷³öµÄͼÏñÊǹýÔ­µãµÄÖ±Ïߣ¬ËµÃ÷ÖÊÁ¿ÓëËٶȵÄijÖÖ¹Øϵ³ÉÕý±È£¬Óɶ¯Äܶ¨Àí¿É֪ͼÏñµÄºá×ø±êÓ¦¸ÃÊÇ£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

ÏÖÒªÑéÖ¤¡°µ±ÖÊÁ¿Ò»¶¨Ê±£¬ÎïÌåÔ˶¯µÄ¼ÓËÙ¶ÈÓëËüËùÊܵĺÏÍâÁ¦³ÉÕý±È¡±ÕâÒ»ÎïÀí¹æÂÉ¡£¸ø¶¨µÄÆ÷²ÄÈçÏ£ºÒ»Çã½Ç¿ÉÒÔµ÷½ÚµÄ³¤Ð±Ã棨Èçͼ£©¡¢Ð¡³µ¡¢¼ÆʱÆ÷Ò»¸ö¡¢Ã׳ߡ£

¢ÅÌîÈëÊʵ±µÄ¹«Ê½»òÎÄ×Ö£¬ÍêÉÆÒÔÏÂʵÑé²½Ö裨²»¿¼ÂÇĦ²ÁÁ¦µÄÓ°Ï죩£º
¢ÙÈÃС³µ×ÔбÃæÉÏ·½Ò»¹Ì¶¨µãA1´Ó¾²Ö¹¿ªÊ¼Ï»¬µ½Ð±Ãæµ×¶ËA2£¬¼ÇÏÂËùÓõÄʱ¼ät¡£
¢ÚÓÃÃ׳߲âÁ¿A1ÓëA2Ö®¼äµÄ¾àÀës£¬ÔòС³µµÄ¼ÓËÙ¶Èa£½            ¡£
¢ÛÓÃÃ׳߲âÁ¿A1Ïà¶ÔÓÚA2µÄ¸ß¶Èh£¬ÉèС³µËùÊÜÖØÁ¦Îªmg£¬ÔòС³µËùÊܵĺÏÍâÁ¦F£½               ¡£
¢Ü¸Ä±ä             £¬Öظ´ÉÏÊö²âÁ¿¡£
¢ÝÒÔhΪºá×ø±ê£¬1/t2Ϊ×Ý×ø±ê£¬¸ù¾ÝʵÑéÊý¾Ý×÷ͼ¡£ÈçÄܵõ½Ò»Ìõ¹ýÔ­µãµÄÖ±Ïߣ¬Ôò¿ÉÑéÖ¤¡°µ±ÖÊÁ¿Ò»¶¨Ê±£¬ÎïÌåÔ˶¯µÄ¼ÓËÙ¶ÈÓëËüËùÊܵĺÏÍâÁ¦³ÉÕý±È¡±ÕâÒ»¹æÂÉ¡£
¢ÆÔÚ̽¾¿ÈçºÎÏû³ýÉÏÊöʵÑéÖÐĦ²Á×èÁ¦Ó°ÏìµÄ¹ý³ÌÖУ¬Ä³Í¬Ñ§Éè¼ÆµÄ·½°¸ÊÇ£º
¢Ùµ÷½ÚбÃæÇã½Ç£¬Ê¹Ð¡³µÔÚбÃæÉÏÔÈËÙÏ»¬¡£²âÁ¿´ËʱA1µãÏà¶ÔÓÚбÃæµ×¶ËA2µÄ¸ß¶Èh0¡£
¢Ú½øÐТÅÖеĸ÷Ïî²âÁ¿¡£
¢Û¼ÆËãÓë×÷ͼʱÓã¨h£­h0£©´úÌæh
¶Ô´Ë·½°¸ÓÐÒÔϼ¸ÖÖÆÀÂÛÒâ¼û£º
A£®·½°¸ÕýÈ·¿ÉÐС£
B£®·½°¸µÄÀíÂÛÒÀ¾ÝÕýÈ·£¬µ«ÀûÓÃËù¸øµÄÆ÷²ÄÎÞ·¨È·¶¨Ð¡³µÔÚбÃæÉÏÊÇ·ñ×öÔÈËÙÔ˶¯¡£
C£®·½°¸µÄÀíÂÛÒÀ¾ÝÓÐÎÊÌ⣬С³µËùÊÜĦ²ÁÁ¦ÓëбÃæÇã½ÇÓйء£
ÆäÖкÏÀíµÄÒâ¼ûÊÇ              ¡£

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

ijͬѧÔÚ×ö¡°²â¶¨ÔȱäËÙÖ±ÏßÔ˶¯µÄ¼ÓËٶȡ±ÊµÑéʱ´ò³öµÄÖ½´øÈçͼËùʾ£¬Ã¿Á½µãÖ®¼ä»¹ÓÐËĵãûÓл­³öÀ´£¬Í¼ÖÐÉÏÃæµÄÊý×ÖΪÏàÁÚÁ½µã¼äµÄ¾àÀ룬´òµã¼ÆʱÆ÷ÒªÇóʹÓà        µçÔ´£¬ÈôƵÂÊΪ50HzÔòÆäÖÜÆÚΪ          s¡££¨Ã¿¿Õ3·Ö£©

£¨1£©´ò¼ÆÊýµã4ʱֽ´øµÄËÙ¶Èv4 =                     ¡££¨3·Ö£©£¨´ð°¸±£ÁôÈýλÓÐЧÊý×Ö£©
£¨2£©0¡ª6µã¼äµÄ¼ÓËÙ¶ÈΪa=                    ¡££¨3·Ö£©£¨´ð°¸±£ÁôÈýλÓÐЧÊý×Ö£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºµ¥Ñ¡Ìâ

ÓÒͼÊÇijС×éͬѧΪÑо¿»¬¶¯Ä¦²ÁÒòÊýËùÉè¼ÆµÄʵÑé×°Öá£ÆäÖÐAΪһÖÊÁ¿ÎªMµÄ³¤Ö±Ä¾°å£¬BΪľ°åÉÏ·ÅÖõÄÖÊÁ¿ÎªmµÄľ¿é£¬QΪľ¿éÓÒ¶ËÁ¬½ÓµÄÒ»µ¯»É²âÁ¦¼Æ¡£ÊµÑéʱÓÃÁ¦½«A´ÓBµÄÏ·½³é³ö£¬Í¨¹ýQµÄ¶ÁÊý¼´¿É²â³ö¶¯Ä¦²ÁÒòÊý¡£ÈôʵÑéÌõ¼þ½ÏΪÀíÏ룬Ôò£¨   £©
A£®Ö»Óн«Ä¾°åAÔÈËÙ³é³ö²ÅÄÜ´ÓQÉ϶ÁÈ¡Îȶ¨¶ÁÊý
B£®½«Ä¾°åA¼ÓËÙ¡¢¼õËÙ»òÔÈËÙ³é³ö¾ùÄÜ´ÓQÉ϶ÁÈ¡Îȶ¨¶ÁÊý
C£®Í¨¹ý¸Ã·½·¨¿É²âµÃAÓëBÖ®¼äµÄ¶¯Ä¦²ÁÒòÊý
D£®Í¨¹ý¸Ã·½·¨¿É²âµÃAÓëµØÃæÖ®¼äµÄ¶¯Ä¦²ÁÒòÊý

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

ÔÚÑо¿Ä¦²ÁÁ¦µÄʵÑéÖУ¬Óõ¯»É²âÁ¦¼ÆˮƽÀ­Ò»·ÅÔÚˮƽ×ÀÃæÉϵÄСľ¿é£¬Ð¡Ä¾¿éµÄÔ˶¯×´Ì¬¼°µ¯»É²âÁ¦¼ÆµÄ¶ÁÊýÈçϱíËùʾ(ÿ´ÎʵÑéʱ£¬Ð¡Ä¾¿éÓë×ÀÃæµÄ½Ó´¥ÃæÏàͬ).ÔòÓɴ˱í·ÖÎö¿ÉÖª

(1)ľ¿éÊܵ½µÄ×î´ó¾²Ä¦²ÁÁ¦     (Ìî¡°´óÓÚ¡± ¡¢¡°µÈÓÚ¡±»ò¡°Ð¡ÓÚ¡±) 0.5 N£»
(2)ÔÚÕâÎå´ÎʵÑéÖУ¬Ä¾¿éÊܵ½µÄĦ²ÁÁ¦´óСÓР    ´ÎÊÇÏàͬµÄ¡¢¸ÃĦ²ÁÁ¦´óСΪ      N.

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

ÔÚ¡°Ì½¾¿Ð¡³µËÙ¶ÈËæʱ¼ä±ä»¯¹æÂÉ¡±µÄʵÑéÖУº
£¨1£©¸ù¾Ý´òµã¼ÆʱÆ÷´ò³öµÄÖ½´ø£¬¿ÉÒÔ´ÓÖ½´øÉÏÖ±½Ó²âÁ¿µÃµ½µÄÎïÀíÁ¿ÊÇ___________.
A£®Î»ÒÆ       B£®ËٶȠ      C£®¼ÓËٶȠ       D£®Æ½¾ùËÙ¶È
£¨2£©ÏÂÁвÙ×÷ÖÐÕýÈ·µÄÓР        ¡££¨ÌîÑ¡Ïî´úºÅ£©
A£®ÔÚÊÍ·ÅС³µÇ°£¬Ð¡³µÒª¿¿½ü´òµã¼ÆʱÆ÷
B£®´òµã¼ÆʱÆ÷Ó¦·ÅÔÚ³¤Ä¾°åµÄÓл¬ÂÖÒ»¶Ë
C£®Ó¦ÏȽÓͨµçÔ´£¬ºóÊÍ·ÅС³µD£®´òµã¼ÆʱÆ÷ӦʹÓÃÖ±Á÷µçÔ´
£¨3£©´òµã¼ÆʱÆ÷Ô­À´Ê¹ÓõĵçÔ´µÄƵÂÊÊÇ50Hz£¬ÈôÔڲⶨÔȱäËÙÖ±ÏßÔ˶¯µÄ¼ÓËÙ¶Èʱ£¬½»Á÷µçµÄƵÂÊΪ60Hz¶øδ±»·¢¾õ£¬ÕâÑù¼ÆËã³öµÄ¼ÓËÙ¶ÈÖµÓëÕæʵֵÏà±ÈÊÇ________. £¨Ìî¡°Æ«´ó¡±¡¢¡°Æ«Ð¡¡±»ò¡°²»±ä¡±£©
£¨4£©ÏÂͼµÄÖ½´ø¼Ç¼ÁËС³µÄ³´ÎÔ˶¯µÄÇé¿ö£¬Í¼ÖÐA¡¢B¡¢C¡¢D¡¢EΪÏàÁڵļÇÊýµã£¬ÏàÁÚ¼ÇÊýµã¼äµÄʱ¼ä¼ä¸ôT=0.1s¡£

¢Ù¸ù¾Ý____¿ÉÅж¨Ð¡Çò×öÔȼÓËÙÖ±ÏßÔ˶¯¡£
¢ÚvD="________" m/s
¢Û¼ÓËÙ¶È=_________m/s2

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

£¨6·Ö£©Ä³Í¬Ñ§ÔÚ×ö¡°Ñо¿Æ½Å×Ô˶¯¡±µÄʵÑéÖУ¬ÓÃÒ»ÕÅÓ¡ÓÐС·½¸ñµÄÖ½¼Ç¼¹ì¼£¡£ÊµÑé×°ÖÃÈçͼËùʾ¡£

£¨1£©¸Ãͬѧ×öÍêʵÑéºó£¬Ìá³öÁËÏÂÁм¸Ìõ¹Ûµã£¬ÆäÖÐÕýÈ·µÄÊÇ________¡££¨¶àÑ¡£©
A£®ÊµÑéÖÐӦʹб²Û¹ìµÀ¾¡¿ÉÄܹ⻬
B£®ÎªÊ¹Ð¡ÇòÀ뿪б²ÛºóÄÜ×öƽÅ×Ô˶¯£¬Ð±²ÛÄ©¶ËµÄÇÐÏß±ØÐëˮƽ
C£®ÎªÁËʹСÇòÿ´ÎµÄ¹ì¼£Ïàͬ£¬Ó¦Ê¹Ð¡Çòÿ´Î´Óб²ÛÉϵÄÏàͬλÖÃÓɾ²Ö¹ÊÍ·Å
D£®ÎªÁ˱ȽÏ׼ȷµØÃè³öСÇòÔ˶¯µÄ¹ì¼££¬Ó¦¸ÃÓÃÒ»ÌõÇúÏß°ÑËùÓеĵãÁ¬½ÓÆðÀ´
£¨2£©ÏÂͼΪËûͨ¹ýʵÑé¼Ç¼µÄƽÅ×Ô˶¯¹ì¼£µÄÒ»²¿·Ö£¬²¢Ôڹ켣Éϱê¼ÇÁËËĸöµãa¡¢b¡¢c¡¢d¡£ÒÑ֪С·½¸ñ±ß³¤ÎªL£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£¬ÔòСÇò×öƽÅ×Ô˶¯µÄ³õËÙ¶Èv0=________¡£

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

ÔÚ×ö¡°Ñо¿ÔȱäËÙÖ±ÏßÔ˶¯¡±µÄʵÑéʱ£¬ÎªÁËÄܹ»½Ï׼ȷµØ²â³ö¼ÓËٶȣ¬½«ÄãÈÏΪÕýÈ·µÄÑ¡ÏîÇ°ÃæµÄ×ÖĸÌîÔÚºáÏßÉÏ£º______________________
A£®°Ñ¸½Óл¬Âֵij¤Ä¾°å·ÅÔÚʵÑé×ÀÉÏ£¬²¢Ê¹»¬ÂÖÉì³ö×ÀÃæ
B£®°Ñ´òµã¼ÆʱÆ÷¹Ì¶¨ÔÚ³¤Ä¾°åÉÏûÓл¬ÂÖµÄÒ»¶Ë£¬Á¬½ÓºÃµç·
C£®ÔÙ°ÑÒ»ÌõϸÉþË©ÔÚС³µÉÏ£¬Ï¸Éþ¿ç¹ý»¬ÂÖ£¬Ï±߹ÒÉϺÏÊʵĹ³Âë
D£®°ÑÖ½´ø´©¹ý´òµã¼ÆʱÆ÷£¬²¢°ÑËüµÄÒ»¶Ë¹Ì¶¨ÔÚС³µµÄºóÃæ
E£®°ÑС³µÍ£ÔÚ¿¿½ü´òµã¼ÆʱÆ÷´¦£¬½ÓֱͨÁ÷µçÔ´ºó£¬·Å¿ªÐ¡³µ£¬ÈÃС³µÍÏ×ÅÖ½´øÔ˶¯£¬´òµã¼ÆʱÆ÷¾ÍÔÚÖ½´øÉÏ´òÏÂһϵÁеĵ㣬ËæºóÁ¢¼´¹Ø±ÕµçÔ´£¬»»ÉÏÐÂÖ½´ø£¬Öظ´Èý´Î
F£®´ÓÈýÌõÖ½´øÖÐÑ¡ÔñÒ»Ìõ±È½ÏÀíÏëµÄÖ½´ø£¬Éáµô¿ªÍ·±È½ÏÃܼ¯µÄµã£¬ÔÚºó±ß±ãÓÚ²âÁ¿µÄµØ·½ÕÒÒ»¸ö¿ªÊ¼µã£¬²¢°Ñÿ´òÎå¸öµãµÄʱ¼ä×÷Ϊʱ¼äµ¥Î»£®ÔÚÑ¡ºÃµÄ¿ªÊ¼µãÏÂÃæ¼Ç×÷0£¬ÍùºóµÚÁù¸öµã×÷Ϊ¼ÆÊýµã1£¬ÒÀ´Ë±ê³ö¼ÆÊýµã2¡¢3¡¢4¡¢5¡¢6£¬²¢²âËã³öÏàÁÚÁ½µã¼äµÄ¾àÀë
G£®¸ù¾Ý¹«Ê½a1£½(x4£­x1)/3T2£¬a2£½(x5£­x2)/3T2£¬a3£½(x6£­x3)/3T2¼°£½(a1£«a2£«a3)/3Çó³ö

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

ÈçͼΪ¡°Ì½¾¿ÇóºÏÁ¦µÄ·½·¨¡±µÄʵÑé×°Öã®POΪÏðƤÌõ£¬Á½²âÁ¦¼Æͨ¹ýÉþ×ÓÀ­ÏðƤÌõÒ»¶Ë£¬Ê¹ÏðƤÌõˮƽ¡£À­Á¦µÄ´óС¿É´Ó²âÁ¦¼ÆÖжÁÈ¡¡£¶Ô±¾ÊµÑ飺

(1)ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ      
A.ÔÚ²âÁ¿Í¬Ò»×éÊý¾ÝF1¡¢F2ºÍºÏÁ¦FµÄ¹ý³ÌÖУ¬ÏðƤÌõ½áµãOµÄλÖò»Äܱ仯
B.µ¯»É²âÁ¦¼ÆÀ­Ï¸Ïßʱ£¬À­Á¦·½Ïò±ØÐëÊúÖ±ÏòÏÂ
C.F1¡¢F2ºÍºÏÁ¦FµÄ´óС¶¼²»Äܳ¬¹ýµ¯»É²âÁ¦¼ÆµÄÁ¿³Ì
D.Ϊ¼õС²âÁ¿Îó²î£¬F1¡¢F2·½Ïò¼ä¼Ð½ÇӦΪ90¡ã
(2)ÔÚ´ËʵÑéÖУ¬¼ÙÈçF1µÄ´óС¼°·½Ïò¹Ì¶¨²»±ä£¬ÄÇôΪÁËʹÏðƤÌõÈÔÈ»É쳤µ½Oµã£¬¶ÔF2À´Ëµ£¬ÏÂÃ漸ÖÖ˵·¨ÖÐÕýÈ·µÄÊÇ_______
A.F2¿ÉÒÔÓжà¸ö²»Í¬µÄ·½Ïò
B.F2µÄ·½ÏòºÍ´óС¿ÉÒÔÓжà¸öÖµ
C.F2µÄ·½ÏòºÍ´óСÊÇΨһȷ¶¨µÄ
D.F2µÄ·½ÏòÊÇΨһµÄ£¬µ«´óС¿ÉÒÔÓжà¸öÖµ

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸